Improvement in metallic packers



v 2 Shets-Sfh-eetl AA.. CUNNINGHAM. Metallic-Packer. No. 216,946.Patented July 1, 1879.

' Fay'o,

N. PETERS, PHOTOLITHOGRAPNEN. WASHINGTON. D C.

2 Sheets-Sheet 2.

A. CUNNINGHAM.

`lVIe'NLllc-Packer. No. 216,946. Patented Julyr1, 1879.

Ezy Jaya. L

II IMI, a

UNITED STATES PATENT OEEIGE.

ANDBUS CUNNINGHAM, OF PLEASANTVILLE, PENNSYLVANIA.

IMPROVEMENT IN METALLIC PACKERS.

Specification forming part of Letters Patent No. 216,946, dated July 1,1879 application -led October 4, 1878.

To all whom it may concern.-

Beit known that I, ANDRUs CUNNINGHAM, of Pleasantville, in the county ofVenango and State of Pennsylvania, have invented a new and usefulImprovement in Metallic Packers; and I do hereby declare the followingto be a full, clear, and exact description thereof, referen cebein g hadto the accompanying drawings, forming a partof this specification, inWhich- Figure l represents a vertical section of my improved packer withboth cups in Working position. Fig. 2 is a cross-section of the same,taken through line 2 2 of Fig. 1. Fig. 3 i's a vertical section of theoutside cup. Fig. 4 is a vertical section of the inside cup. Fig. 5 isan elevationof my improved packer as applied to the Working-barrel of apump. Fig. 6 represents a vertical section of the same detached from thepump. Fig. 7 represents my packer as applied to a piston-rod or plunger.Figs.

8 and 9 are modifications.

My invention consists in the novel construction and arrangement ofmetallic cups for packing pistons, pumps, stuffing-boxes, and for anysuitable position or place where a packer can be available.

It further consists in the arrangement of the cups, being so slottedthat the joints can be broken, making a perfectly tight 4and alsoself-cleaning packer.

A represents my cup-packer, provided with outside and inside cups, Aland B. The out# side cup on the inside isconical or tapering, while theinside cup is also conical or tapering. The inclination or angle of theinside of the outside cup and the outside of the inside cup are exactlythe same, fitting so snugly as to be water and steam tight.

The outside cup is provided With vertical grooves a a a a. The insidecup is also provided With the same number of vertical grooves b b b b.

When the cups are in working position the grooves or slots of one cupare ninety degrees and one hundred and eighty degrees, and the groovesor slots on the other cup are forty-five degrees, thus breaking thejoints and packing as tightly as an unbroken packing.

The packing of the cups is governed by the length of the slots orgrooves the cups being turned out of solid material, somewhat larger indiameter on the outside than the inside of the piston or packing-barrel.f

In using my packer for a steam-engine I make an elongated annular grooveon the inside and contract the length of the cups, the annular groovethus governing the elasticity in a short cup, and producing the sameresults as deep slots without an annular groove.

When using a piston-rod or plunger I employ the inside of the cups, asshown at A2, Fig. 7. The cups can extend on the inside or outside of thecylinder or pump, as occasion may demand.

Figs. 5 and 6 illustrate my packers as applied to a pump-barrel. securedto the opposite ends of an elongated nut, C, said nut being providedWith screwthreads for receiving the ends of valve-stems D D. Said stemshave projections d d, forming an annular iiange, which impinge on theanges or shoulders b2 b2 of the inside cups, B B, thus holding themsecurely to thenut G. The stem D has secured thereon a cage inclosing anordinary ball-valve, G.

In oilwells and mining pumps the valves are constantly wearing, from thefriction of sand, grit, and other foreign substances, and the great lossof time and expense for repairing the same is a consideration to beregarded, especially in deep working Wells.

In my improved cup-packer all the difficulty is obviated. The sand andgrit are forced up and down with every motion of the pump-rod by theaction of the sharp edges onthe flared ends of the cups. They hug thepump-barrel so closely that uid of any kind cannot pass, thus cleaningthe pump at every stroke.

I do not confine myself to any'number of cups, as two or more can beused; nor do I confine myself to any number of slots, as one or more canbe used and produce the same results.

What I claim as new, and desire to secure by Letters Patent, is

1. In a Well-packer, the combination of an external conical cup,provided with longitudi nal slots and a sharp edge, with an internalconical cup, also provided with longitudinal The packers A A are i slotsand an internal shoulder, b2, substantially as and for the purposedescribed.

2. The combination of en external conical cup, provided withlongitudinal slots, and an internal cup, havin g longitudinal slots anda shoulder, b2, with n valve stein, D, provided with a shoulder, d, andun elongated nut, G,

forming a pipe-coupling7 all constructed to operate substantially asa-ndfor the purpose described. f i

ANDRUS CUNNINGHAM. Witnesses:

JAMES O. BoYcE,

W. R. EDELEN.

